When compiling expressions followed by a unary operator, the compiler
triggered a segmentation fault due to invoking an unset infix parser
routine.

-- Testcase --
1~1
-- End --

-- Args --
-R
-- End --

-- Expect stderr --
Syntax error: Expecting ';' or binary operator
In line 1, byte 2:

 `1~1`
   ^-- Near here


-- End --